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From: newton@cit-vax.Caltech.Edu (Mike Newton)
Newsgroups: comp.sys.mac
Subject: Re: SCREENS HURT EYES (Mac SE, Plus)
Message-ID: <4555@cit-vax.Caltech.Edu>
Date: Sun, 15-Nov-87 18:56:16 EST
Article-I.D.: cit-vax.4555
Posted: Sun Nov 15 18:56:16 1987
Date-Received: Mon, 16-Nov-87 07:15:54 EST
References: <1767@batcomputer.tn.cornell.edu> <993@ski.UUCP> <2923@batcomputer.tn.cornell.edu>
Reply-To: newton@cit-vax.UUCP (Mike Newton)
Organization: California Institute of Technology
Lines: 75
Keywords: screens, screen, hurt, eyes, Clinton Taiwan Corp.

When I first go my mac II i went throught many of the old archves of
this and another group.  I no longer keep them around (too big), but several
things stood out.  One was the the message about screens hurting eyes.
Thought I no longer have the old messages, IF MEMORY SERVES ME CORRECTLY
the enclosed copy is yet another identical copy of the same message.

Why?  Is the poster a lawyer ?  I think an explanation is in
order.


???In article <2923@batcomputer.tn.cornell.edu> dyckman@tcgould.tn.cornell.edu (Howard L. Dyckman) writes:
???>My eyes have been hurt by some recent Macintosh screens (SE, Plus).
???>Symptoms include sensitivity to light, dryness, grittiness under
???>the eyelids, soreness.  A brief exposure produced only soreness.
???>
???>Another screen was mildly irritating; I had to use it with the
???>intensity turned down low.
???>
???>These screens feel harsh to my eyes; they also "feel" brighter than they look.
???>
???>I am an experienced Mac user; older Mac screens have never hurt my eyes.
???>
???>Has anyone encountered problems like this?  (PLEASE BE ALERT TO PEOPLE YOU
???>KNOW OR MIGHT HEAR ABOUT.)  If so, please reply to me directly.
???>You can also post on the  comp.sys.mac  bulletin board.
???>
???>     Howard L. Dyckman, Dept. of Electrical Engineering, Phillips Hall,
???>     Cornell University, Ithaca, NY 14853.
???>          dyckman@tcgould.tn.cornell.edu
???>
???>Here's more info:
???>
???>The screens which bothered me had purple tint or blue with slight purple
???>tint.  I have inspected some of them; mfr is Clinton Taiwan Corp.
???>
???>Eyes hurt much worse than what ophthalmologist describes here:
???>
???>In article <993@ski.UUCP> dr@ski.UUCP (David Robins) writes:
???>>As an ophthalmologist, I have seen many computer-related eye problems.
???>>All of them have turned out to be *NOT* due to the computer equipment
???>>itself, except when an out-of-focus or flickering system causes eyestrain.
???>>... Staring at anything, but particularly a terminal, reduces the blink
???>>rate.  Tear evaporation takes place, and air "burns" the conjunctiva
???>>and cornea.  This leads to dryness, grittyness, foreign body
???>>sensation, burning, and sometimes photophobia (light sensitivity).  It
???>>can feel just like UV keratitis (corneal burn).  ...
???>>Treatment is the same, but UV burn takes 1-2 days to heal, whereas dry
???>>eye heals overnight.  One uses artificial tears, an over-the-counter
???>>preparation, every 1-2 hours, ointment at bedtime optional.
???>
???>My eyes have been sore, dry, and sensitive for months, not 1-2 days.
???>They are recovering slowly.  At one time, my eyes were so dry that mild
???>breezes bothered them, making it very uncomfortable to take a walk
???>outdoors.  These and other symptoms were caused by some recent Macintosh
???>computer screens (SE, Plus).  Prior to this experience, other
???>exposures produced symptoms which lasted for days.
???>
???>I am an experienced Mac user; older Mac screens (as well as other
???>computer screens) have never hurt my eyes.
???>
???>Ophthalmologist's reply above is well meant but is not the explanation for
???>my symptoms.
???>
???>If you know of anyone who has had similar problems (perhaps
???>milder or shorter lasting) please contact me directly.
???>
???>     Howard L. Dyckman, Dept. of Electrical Engineering, Phillips Hall,
???>     Cornell University, Ithaca, NY 14853.
???>          dyckman@tcgould.tn.cornell.edu
-- 
newton@csvax.caltech.edu	{ucbvax!cithep,amdahl}!cit-vax!newton
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